Acura is one of the best car from honda. on this post you can download the Owners Manual for your Acura 2004 - 2007 TL Backup Sensors. this manual in pdf file is very important to read by all the acura 2004-2207 owners. Before using the backup sensors, make sure you read and understand the operation and limitations of the system as discussed below and elsewhere in this manual. The backup sensors are designed to provide and audible sound when they detect large stationary objects while the vehicle is moving in reverse at low speed. However, the system may not detect all possible objects depending on their size, shape, or location.